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-rw-r--r--xpcom/threads/ThreadEventTarget.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/xpcom/threads/ThreadEventTarget.h b/xpcom/threads/ThreadEventTarget.h
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+++ b/xpcom/threads/ThreadEventTarget.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ThreadEventTarget_h
+#define mozilla_ThreadEventTarget_h
+
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/Mutex.h"
+#include "mozilla/SynchronizedEventQueue.h" // for ThreadTargetSink
+#include "nsISerialEventTarget.h"
+
+namespace mozilla {
+class DelayedRunnable;
+
+// ThreadEventTarget handles the details of posting an event to a thread. It can
+// be used with any ThreadTargetSink implementation.
+class ThreadEventTarget final : public nsISerialEventTarget {
+ public:
+ ThreadEventTarget(ThreadTargetSink* aSink, bool aIsMainThread,
+ bool aBlockDispatch);
+
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIEVENTTARGET_FULL
+
+ // Disconnects the target so that it can no longer post events.
+ void Disconnect(const MutexAutoLock& aProofOfLock) {
+ mSink->Disconnect(aProofOfLock);
+ }
+
+ // Sets the thread for which IsOnCurrentThread returns true to the current
+ // thread.
+ void SetCurrentThread(PRThread* aThread);
+ // Call ClearCurrentThread() before the PRThread is deleted on thread join.
+ void ClearCurrentThread();
+
+ size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
+ size_t n = 0;
+ if (mSink) {
+ n += mSink->SizeOfIncludingThis(aMallocSizeOf);
+ }
+ return aMallocSizeOf(this) + n;
+ }
+
+#ifdef DEBUG
+ static void XPCOMShutdownThreadsNotificationFinished();
+#endif
+
+ private:
+ ~ThreadEventTarget();
+
+ RefPtr<ThreadTargetSink> mSink;
+#ifdef DEBUG
+ const bool mIsMainThread;
+#endif
+ const bool mBlockDispatch;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_ThreadEventTarget_h